Patent No. 6,766,028 - OFI Testing Equipment, Inc.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 20
d. “Shear Rate Units”: Changes the shear rate units. Enter selection
number or leave alone if unchanged.
1 = RPM 2 = 1/s (Reciprocal seconds)
Press ENTER and then NEXT.
e. “Spring #”: Changes the Torsion Spring Assembly, F0.2, F0.5, F1.0,
F2.0, etc. A spring number will be displayed.
“New”: Enter selection number or leave alone if unchanged.
Press ENTER and then NEXT.
f. “Temperature Units”: Either “C” or “F” will be displayed
“New”: To change temperature scale from existing one.
Enter selection number or leave alone if unchanged.
1 = C (Celsius) 2 = F (Fahrenheit)
Press ENTER and then NEXT.
g. “Temp. Control”: Determines how the temperature is to be
controlled. Either “0” or “1” will be displayed.
“New”: To change from existing mode.
0 = Auto - Temperature controlled from Viscometer
1 = Manual - Temperature controlled by Heat Cup Knob
Press ENTER and then NEXT. This will take you back to the
beginning.
Press CLEAR/ STOP.
h. “Temperature Offset”: Refer to the “Thermocouple Calibration”
section on page 47.
6. CAL
Provides a quick and easy method of internally calibrating the viscometer.
Refer to the “Calibration - Standalone” section on page 14 for more
details.
7. MUD
By pressing this button once, the viscometer will automatically measure,
calculate and display Plastic Viscosity (“PV”) in cP and Yield Point
(“YP”) in the shear stress unit specied in SET UP (see page 19),
as per API recommended practice 13B1, 13B2, and 13D. This enables
the technician to simultaneously perform other tasks, and it assures
increased accuracy and reproducibility, as each test is conducted in the
same manner and for the same time periods.
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